81221984

素因数分解:

$2^5\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{1997}}^1$

素因数の和:2079

約数の個数: 48

約数和(自身を含む): 169174656

約数和(自身を除く): 87952672

約数列:

[1, 2, 4, 8, 16, 31, 32, 41, 62, 82, 124, 164, 248, 328, 496, 656, 992, 1271, 1312, 1997, 2542, 3994, 5084, 7988, 10168, 15976, 20336, 31952, 40672, 61907, 63904, 81877, 123814, 163754, 247628, 327508, 495256, 655016, 990512, 1310032, 1981024, 2538187, 2620064, 5076374, 10152748, 20305496, 40610992, 81221984]

約数ペア:

[(1, 81221984), (2, 40610992), (4, 20305496), (8, 10152748), (16, 5076374), (31, 2620064), (32, 2538187), (41, 1981024), (62, 1310032), (82, 990512), (124, 655016), (164, 495256), (248, 327508), (328, 247628), (496, 163754), (656, 123814), (992, 81877), (1271, 63904), (1312, 61907), (1997, 40672), (2542, 31952), (3994, 20336), (5084, 15976), (7988, 10168)]